Abstract
In this paper, a variable preload force control structure utilizing piezoelectric actuators (PEAs) is proposed for the stability control of the feed drive system. Three PEAs are installed between the two nuts to exert preload force on the ball screw, leading to an elimination or substantial reduction of the backlash, which is the main cause of instability of feed drives. This results in better machining precision throughout the operation process. In addition, the force analysis of the whole preload feed drive system is established. Moreover, the hysteresis of the PEAs is determined with reference to the Prandtl–Ishlinskii (P-I) model. Lastly, the P-I model-based feedforward controller is applied to the feed drive system to improve the resultant machining precision. Based on the modeling and experiments, to demonstrate the efficacy and high-performance of the proposed P-I model-based control algorithm against conventional PID control system, comparative experiments are conducted, showing satisfactory results.
Highlights
The hysteretic model is an indispensable part of the preload force control that is necessary in order to compensate the hysteresis error
Two
Tor, and a PID controller were applied in the feed drive system, and the inverse of the P‐I
Summary
With regard to passive devices, V Paleu et al [7] developed the application of Fe-Mn-Si-based shape memory alloys for axial variable preload force of ball bearings. The methods described above introduce a preload force onto the bearing of the spindles When it comes to milling machines, the ball screw directly affects the quality of the processing owing to the additional presence of backlash. A type of ball screw preload structure using PEAs was introduced in [15], which achieved real-time adjustment of preload force, but the response was not fast enough due to the control strategy used. This paper ing with the application of PEAs and the P‐I model‐based control strategy to increase the focuses on the increased stability of the feed drive system in ultraprecision machining with stiffness of the system at a high response rate. The application of PEAs and the P-I model-based control strategy to increase the stiffness of the system at a high response rate
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
